Artificial tooth



c. HALLOWELL TIFICIAL TOOTH Fild April 6, 1926 I firin l I uurr ao sTATEs PATENT foFFl-c Patented Sept. 11, 1928..

CLIFTON clHAjLLow LL, or DREXEL HILLyPENNSYLVANIA, AssrsNoa'ro THE s. s. WHITEDENIAL MANUFACTURING COMPANY, A CORPORATION 017 PEN SYLVANI ARTIFICIAL roo'rn.

Application fiiea'a rn e, 1926. Serial No. 100,038. r

a i invention relates particularly to that i which might tend to be chipped off or class of artificial teeth commonly known as pontic teeth, in which the tooth-body ism ranged to be supported upon its occlusally disposed end and has its root endeXtended to engage inthe socket from which a natural tooth root; has beenextracted, for the purpose of preventing or arresting the absorp tion: of the gums, and is especially directed to the form of the occlusally disposed end 'whereby it is guided into position and retained by its cooperation with the inner face of the cuspstructure included in abridge,

or otherconvenint form ofsupport.

to provide an artificial tooth with a convexed occlu'sally disposed-end face that may be "so'cooperative with a correspondingly concaved inner endface ofa supporting cusp structure astoefiect a rocking motion of the tooth-body when moved into'or out of operative position, while in the-gumsocket. V a V Otherobjects of my invention are to provide an artificial tooth so constructed and arranged as to avoid the-formation of. sharp or acute angled edges-on the porcelain toothbe otherwise marred or fractured. a r

tooth comprising atooth-body and 'a cusp structure, respectively, hayingtheir opposed end faces provided with interengaging'mealns whereby they may be guided and removably engaged, when the-t'ooth-body is-rocked into operative position with respect tojits cusp structure. "My invention comprehends an artificial.

' -tooth comprising a tooth-body and cusp structure respectively having their opposed end faces formed of cooperative plane and Rcurvedsurfaces affording guiding and inter- 1' engaging means that may be readily true d to facilitate their assemblage andafiord proper re istry. f 1

pecifically stated, the; form of my invention as hereinafter: described, comprehends a tooth-{body having a root. extension preferably) terminating in an apexof conoidal formation, anda convexed-occlusally disposed end face provided with a slotorrecess directed forwardlyand terminating shortof the outside lateral face'ef said tooth-body,

"and a cusp structurearranged'to support 7 The principalobjects'ofmy invention are 2 its root end is engaged My invention further includesanartificialy I vlew'of the cusp structurepers'e; Fig. 7 is a central vertical longitudinal sectionaljview the tooth-body, and having a similarly con caved inner end face conforming to the convexed end face of said toothbody, and pro tooth-body, and arrangedto so interjengage vided with means projecting therefrom, complementary to theslot or recessin said with said slot or rec'ess as to tend to maintain l in proper registry.

My invention also includes all of the various novel features of construction and arrangement as hereinafter more definitely In the accompanying drawings, Figure-1 i is aside elevational View ofan iartificial tooth vertical longitudinal sectional view of the tootlrstru cture shown-in Fig. 1; Fig. is a "body and cusp structure; FigJQisa central a central verticall0ngit udinal sectional View 1 of thetooth-body in the: act ofrockingfinto -.operative position on the cusp structure,

which is shown in elevation for convenience insai d figure,Fig. 6 is a perspective of a slightly modified form of my invention;

of bridgework embodying two cusp structures respectively fshown in Figs. 6' and bridge structure.

In said figures, thetooth-body 1 has the apical root eXtenSiQn Q'arra-nged to be extended into the root socket3 of thegum ridge 4, which is shown in dot-and'dash ,linesrin Figs. 1 and 3 .The tooth-body 1 has the occlusally disposed convexed end face, 5, which is preferably curved aboutthe apicalroot extension 2 asa center, and which is -provided with a slot or recess6, opening.

convexe d occlusally disposed through said end face 5.

As best shown in Fig.3, theslotorrecess a 6, preferablyhas the plane-surface. 7' oh- 7 sup. ported by relatively spaced caps carried on 'natural teeth, forming abutments for the 'andFig, 8 is a perspective viewof a piece a liquely inclined. withirespect to the curved occlusally disposed end face g5,'and extends toward the outer lateral face 9 of the toothbody ;l,-but terminates in the occlusally disposed end face 5. p i i The tooth-body l is arranged to be sup portedsby the cusp structure 12 having its "infierjendface 13 ,concaved'to conform to the occlusally disposed convened end face 5 of said tooth-body 1. is provided on the said concaved end face 13, with a fin or projection 14.,Cn'1plen1cntary to the recess 6 in the tooth-body 1, and

comprising the obliquely inclined plane surface l extcnding outward in converged rela tion fto ,theflfa'ce .13;so-as to nterengage 1n the slot or recess in the tooth-body 1 and insure the proper registry of saidtooth-bo'dy with the cusp structure'12x l a rj Inwthe form of my invention. shown/in Figure -7, the rtooth body 21 ,lias'the apical;

root 5 extension '22,;and the occlusally disposed end face 25. Saidface '25 is extended in a'planetdirectedflocclusally outward t0- wardtheouter occlusal' edge 26 of'the tooth- .body, and has the. recess 27, the inner face 28 of which is convexed about the'iapical "root extension 22 and terminateswithin the tooth-body. 21 short of the outer lateral face 29. of said tooth-body, Theface .28 of -Said recess 27 m'erges into the sharply inclined abutmentsurface orlwall 30 forming thegouteriwall of' the recess '27.

The tooth-.bodyi21, isarranged to he supported; by the cusp structure 32-liaving its .inneriend face 33-i'nclinedto conform to i theocclusally disposed end face of thetootlr "body 21. Said cusp structure is provided on its inclined end face33 with agfin orprojec tion 34 complementary to the recess '27 in the tooth-bodyfhand comprising the con-V .,.caved face 35,- arranged to. conform to the .convexed face 28 oft-he recess in the toothbody 21, and the inclined end wall 36 serving as an abutment for the dIlSillClIGCCSSQ'l. .It will be obvious that in this form of my invention thetooth-body 21 maybe rocked into registry with the cusp structure 32, by sliding the convexed face '28 of said toothbody 21 upon the concaved face 35 of the cusp structure until the abutment. wall 30 (of theftooth-lbody engages theabutmcnt'wall 2360f the cusp structure'32. a The cusp structures ,12 and'32 may lie supported in' any'suitable manner to afford a mounting for the tooth-bodies 1 and 21, such, for instauce,as shown in Fig. 8, wherein the cusp structures '12 and 32 aredisposed abutment wall I 30 y side by side between the caps 37'" and ;38,;to which they are soldered to form an integral in bridge structure, said caps 37v and 38 being carried bynatural tooth root abutments 4O .andrl"respectively; r

l i I My invention is advantageous inlthat by formi the occlusallydisposed surface of theitooti-body convexed, andtl'ie innersur- Said cusp structure 12 face of the cusp structure correspondingly concaved, the apical root extension may be first inserted into the extracted tooth socket and the tooth-body rocked intoplace about an axis so disposed that said apical root exschtial features of my invention as defined in the appended claims. a

Having thus described my invention, I claim: I

1. An artificial body having "a root extensionyand a convexed occlusally disposed end face provided with a recess having a plane wall inclined in outwardly converging relation to said convexd occlusa'lly disposed erid face.

2. An artificial tooth comprisingxatoothbody having a root "extension, and a conve'xed occlusally disposed end face provided with a recess having a planeavall inclined tooth comprising a tooth- Kill outwardly converging relation to, said convexed occlusally disposed end face, and a cusp structure'having. a similarly con caved inner end face sul'astantia'lly conforming to s'aidyconvexed end face and provided with means arranged toenter'said recess.

3. An artificial toothcomprising a tooth' body having a root; extension, and a convexed occlusally disposed end face provided with a recess having a plane wall inclined in outwardly converging relation to .said' convexedocclusally,disposed end face, and at cusp structure having a similarly; con- "caved inner end face substantially conforming to said convcxed end face and provided with a finarrangedto entersaid recess "and havingan inclined ,face cooperative with the inclined wall of said recess to limit the relative movement of said tooth-body and cusp structure. to 4 i i i 4. An artificial, tooth com rising a cusp structure and 'a separable toot i-body having an apical root extension about which the opposed faces of said toothrbody and cusp structure are curved, said gtooth-body an cusp structure being respectivelyprovided e with-a recess and fin each having an inclined surface converging toward and terminating in said curved surfaces.

. 5. An artificial tooth comprising a cusp structure and a replaceable tooth-body hay-l ing an apical root extension about which the opposed faces-ofsaid tooth-body and cusp structure are: curved, said tooth-body and cusp; structure being respectively provided with a recess and a fiangeless fin interengaging to effect registry of said tooth,-

; body with said cusp structure, but permit ting their relative movement in the directlOIlOi the axisof;saldtooth-bodyo i 6. An artificial tooth comprising a cusp structureand a replaceable tooth-body having an apical root extension, the opposed faces of which each comprise a surface 'curvedabout saidapical root extension and a plane surface 111 oblique angular relation to said curved surface.

7. An artificial tooth'comprising a tooth,- body and a cusp structure arranged to support said tooth-body, each having opposed faces constructed and arranged to permit the tooth-body to be rockedinto operative position upon the cusp structure, while the root end of the'tooth-body is rotatably engaged in the gum socket and the cusp structure is rigidly supporte d in spaced relation to said gum socket, and each having oppositely disposed means complementary to guide the op posed surfaces in slidable relation into reg-. istry, and comprising a recess havinga fin Whose base is of its maximum width. 8. An artificial tooth comprising atoothbody having a root extension, and a convexed occlusally disposed end face provided 7 with a-recess having its inner wall'inclined in outwardly converging relation to said convexed occlusally disposed end face.

In witness whereof, I have hereunto set my hand this fifth day of April, A. D. 1926. 

